we're running resin-pro-4.0.6 and seeing some odd failures when using the CometController for ajax calls. We've observed the exception below:

java.lang.IllegalStateException: dispatch is not valid when no AsyncContext is available
at com.caucho.server.http.AsyncContextImpl.dispatch(AsyncContextImpl.java:213)
at com.caucho.server.dispatch.CometServletFilterChain$ServletCometController.wake(CometServletFilterChain.java:247)
at com.foo.hcf.push.AbstractSubscription.wakeController(AbstractSubscription.java:54)